Naslov
Short-and Long-Term Dentin Bond Strength of Bioactive Glass-Modified Dental Adhesives
(Short- and Long-Term Dentin Bond Strength of Bioactive Glass-Modified Dental Adhesives)

Autori
Oltramare, Ramona ; Par, Matej ; Mohn, Dirk ; Wiedemeier, Daniel B. ; Attin, Thomas ; Tauböck, Tobias T.

Izvornik
Nanomaterials (2079-4991) 11 (2021), 8; 1894, 13

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
nanosized bioactive glass ; dental adhesives ; etch-and-rinse ; self-etch ; micro-tensile bond strength

Sažetak
This study investigated the short- and long-term effects of dental adhesives doped with nano-sized bioactive glass 45S5 (BAG) on the resin–dentin interfacial bond strength. Two etch-and rinse adhesives (Adper Scotchbond Multi-Purpose (ASB) and Solobond Plus (SB)) and one self-etch adhesive (Clearfil SE Bond (CF)) were doped with different concentrations of BAG (5, 10, and 20 wt%). The unmodified (0 wt% BAG) commercial adhesives served as control groups. Dentin of 120 molars (n = 10 per group) was treated with the different adhesives, followed by buildups with a conventional composite restorative material. From each tooth, 14 sticks were prepared for micro- tensile bond strength (TBS) testing. The sticks were stored in simulated body fluid at 37 C and tested after 24 h or six months for TBS and failure mode. Data were analyzed using Kruskal– Wallis tests in combination with post-hoc Conover- tests andWilcoxon signed-rank tests at a level of significance of = 0.05. After 24 h and six months, both etch-and-rinse adhesives with a low BAG content (up to 10 wt% for ASB and 5 wt% for SB) showed similar TBSs as their respective control groups (0 wt% BAG). CF showed a significant decrease in TBS even after addition of 5 wt% BAG. At a high concentration of added BAG (20 wt%), all three adhesives showed a significant decrease in TBS compared to the unmodified controls. The CF control group showed significantly lower TBS after 6 months of storage than after 24 h. In contrast, the TBS of all CF groups modified with BAG was unaffected by aging. In conclusion, the tested etch-and-rinse adhesives can be modified with up to 5 wt% (SB), or 10 wt% (ASB) of BAG without reducing their short- and long-term dentin bond strength. Moreover, the addition of nano- sized BAG may prevent long-term bond strength deterioration of a self-etch adhesive.

Izvorni jezik
Engleski

Znanstvena područja
Dentalna medicina

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